[GTALUG] Unix and Linux System Administration Handbook 5th Ed. by Evi Nemeth et al

The fifth edition of this book was published on Aug, 8th of last year. There's an excellent short summary of systemd timers in section 4.9 and the foreword by Paul Vixie is wonderful. This book can be viewed for free with a valid library card. Navigate to elearning then Safari books. Ivan.